Tool-holder for turret-machines.



no. 664,344. Patented Dec. |8,' I900. a. J. WINKLE.

TOOL HOLDER FOR TURRET MACHINES.

(Application filed Oct. 31; 1899.)

(N o M o d el UNITED STATES PATENT FFICE.

GEORGE J. WINKLE, OF SENECA FALLS, NEW YORK.

TOOL-HOLDER FOR TU RRET-MACHINES.

SPECIFICATION forming part of Letters Patent No. 664,344, dated December 18,1900.

Application filed October 31,1899. Serial No. 735,389' .110 model.)

To all whom it may concern.-

Be it known that I, GEORGE J. WINKLE, a citizen of the United States, residing at Seneca Falls, in the county of Seneca and State of New York, have invented a new and useful Tool-Holder for Turretl\/lachines, of which the following is a specification.

My invention relates to improvements in tool-holders for turret-machines designed for turning bolts, studs, pins, screws, and other kinds of work; and one object in view is to provide an improved tool-holder by which the tool may be given a compound adjustment, first, to position the tool in operative relation to the work, and, secondly, to advance the tool according to successive cuts on the work.

A further object is to provide means which allows the tool to drop away from the Work on the adjustment of the tool-carrier cam in one direction without disturbing the operative relation of the tool-carrier pivot to the work.

A further object is to provide improved means for holding the tool-holder in proper relation to the Work, such holding means being readily adjustable to work which may vary in diameter.

A further object is to provide a tool-holder of simple construction adapted for use in connection with standard types of turrets, as well as to provide for the secure clamping and ready interchange of different tools in the pivotal tool-carrier.

With these ends in view the invention consists in the novel combination of elements and in the construction, arrangement, and adaptation of the various parts for service, which will be hereinafter fully described and claimed.

To enable others to understand the invention, I have illustrated a preferred embodiment thereof in the accompanying drawings, forming a part of this specificaton, and in which-- Figure 1 is a side elevation, partly broken away and in section, of a tool-holder constructed in accordance with my invention and illustrating the same in operative relation to a piece of work. Fig. 2 is a sectional elevation on the plane indicated by the dotted line a: m of Fig. 1 looking in the direction indicated by the arrow. Fig. 3 is a detail plan view of the body of the tool-holder with the pivotal tool-carrier, the means for adjusting the same, and the work-engaging devices removed from said body. Fig. 4 is a side elevation of the tool-carrier removed from the body of the tool-holder. Fig. 5 is an edge elevation of the tool-carrier. Fig. 6 is a detail cross-sectional view on the plane indicated by the dotted line 6 6 of Fig. 2.

Fig.

7 is a detail view of the adjustable plate for ried by the body in operative relation to the V tool-carrier, work-engaging plates supported by the body opposite to the tool-carrier, and means for adjusting said plates.

The elements of my improved tool-holder are represented, in the preferred embodiment of the invention, by the accompanying drawings, and I will now proceed to a detailed description of the construction and the mode of operation.

The body of the tool-holder is indicated in its entirety by the numeral 10, the same being cast in a single piece of metal. This body has an open front plate 11, from one end of which is extended an arm 12, having a circular opening 13. The front plate is provided, at the opposite end from the arm, with the parallel guide-flanges 14, which are disposed above and below the opening in said plate and are arranged to extend laterally therefrom, said guide-flanges being provided in theiropposing faces with the coincident longitudinal grooves 15. A back plate 16 forms an integral part of the holder, so as to lie parallel with the front plate, said back plate having a shank or stem 17, which is preferably tubular and extends from said plate at right angles to the body.

The tool-carrier 18 is represented as asingle block or casting. (Shown more clearly by tool-holder body by a pivotal stud 19-, which passes through a suitable opening in the lower end of the carrier and is fastened firmly to the front plate 11, at the lower edge thereof. Said tool-carrier has a tool-receiving slot 20 formed in its outer face, said slot 20 having the top and bottom walls indicated at 21 22. In the lower wall 22 is a recess 23, and this lower wall is curved in a direction transverse of the aXis of the carrier, the recess 23 corresponding in curvature to the bottom wall 22. A hearingplate 24, preferably of hardened steel, is fitted snugly on the curved wall 22 of the slot, said plate having a rib 23, which enters the recess 23. The bearing plate has its lower face curved to conform to the recess 23, so that the plate will be keyed to the carrier; but the upper face of this hardened bearing-plate is I parallel with the straight top wall- 21 in the tool-slot of the carrier. The tool 25 may be of any suitable construction, with parallel side edges, and it is placed in the slot 20 of the carrier so that its bottom edge will rest on the straight upper face of the hardened-steel bearing-plate 24. Clamping-screws 26 are mounted in the upper part of the carrier and in the vertical plane of the slot 20 therein in order that the inner ends of the screws may projectinto the slot and engage with the top edge of the tool 25, whereby the tool may be clamped firmly upon the bearing-plate in amanner which will hold said tool securely in place on the pivotal carrier. It is evident that the clamping-screws may be released for the purpose of adjusting the tool in the carrier or for removing the tool, so as to permit it to be replaced by another tool.

One element of the compound cam-adjusting device is the eccentric bushing 27. This bushing is provided at one end with an enlarged head or flange 28, and the eccentric part of said bushingis fitted loosely in the circular opening 13 in the arm 12 of the toolholder front plate, so that one end of the cocentric bushing 27 will lie flush with the front face of the arm 12, while the head or flange of said bushing will bear against the rear face of the arm, as clearly shown by Fig. 2. The head or flange 28 of the eccentric bushing has a series of radial sockets 29, in either of which may be fitted an adjusting-pin 30, said pin serving as a means for conveniently turning the eccentric bushing on its axis within the circular opening of the arm forming a part of the tool-holder body, wherebyv the position of the eccentric bushing with relation to the tool-carrier may be varied. Another element of the compound cam-adjusting device is the cam-shaft 31, which is loosely journaled in the eccentric bushing. This cam-shaft carries a cam 32, having a continuous working face of different radii, said cam being fast or integral with one end of the shaft in order to turn therewith. The cam-shaft is inserted in the bushing in a manner for the cam 32 therein to bear against one end of the bushing and the front face of the arm 12, so that the. cam 32 is in operative relation to an edge of the pivotal tool-carrier, and to the free end of the camshaft is pinned or otherwise detachably secured a handle or lever 33, the latter serving as the means by which the camshaft may be. turned in the bushing for the purpose of changing the position of the cam 32 with relation to the pivotal tool-carrier. Said tool-carrieris provided in the edge which faces the cam-shaft with a longitudinal recess 34:, into which projects one edge of the cam- 32, (see Figs. 1 and 5,) the parts being thus disposed to maintain the cam in operative relation to the pivotal carrier.

The cam-shaft and the cam thereon are de-. signed to be turned freely relative to the cocentric bushing for the purpose of easily and quickly adjusting the tool-carrier to or from the work; but the bushing itself is also designed to be adjusted by the pin 30 in order to preliminarily position the cam and its shaft and move the same bodily inward and outward relative to the work, thus giving an increased range of throw to the cam-adjusting devices for the pivotal carrier and mak-' ing the improved tool-holder readily applicable to different pieces of work which vary in diameter. Ordinarily, however, the eccentric bushing remains at rest, and I have provided means by which the eccentric bushing may be frictionally confined in position for the purpose of preventing the bushing from partaking of the free play of the cam and its shaft. Such confining means for the bushing is represented as a frictional brake device embodied in the form of a block or disk of some suitable compressible material 36, such as rawhide or leather, and a compression-screw 37. The friction-block and its compression-screw are housed within a threaded opening orsocket 35,whichis formed radially in the arm 12. The friction block or disk is placed in the bottom of the socket or opening, so as to bear directly upon the cocentric bushing, while the compression-screw has threaded engagement with the wall of the socket in order that it may be adjusted therein to force the friction-block into firm engagement with the bushing. It is evident that the screw may be adjusted to force the friction-block tightly into engagement with the bushing for holding the latter firmly in place; but the bushing may be turned by pressure applied to the adj usting-pin 30,the pressure so applied being sufficient to overcome the frictional engagement of the friction brake-block and said bushing.

38 38 indicate the work-engaging blocks, which are fitted between the parallel guideflanges l lon the front plate of the took-holder body. These blocks or plates are arranged in lateral contact, and at their edges said blocks have the guide-ribs 39'fitted slidably The blocks or plates are thus slidablyconnected with the flanges for adjustment toward or from the work, and at their inner ends saidblocks have the oppositely-inclined faces 40, adapted to be presented so as to partially embrace the surface of the work. An adj ustingstrap 41 lies across the outer ends of the plates or blocks 38 and the holder-body. Said strap has a transverse opening in one end and a notch or open-ended slot in the other end. Adj usting-bolts 42 are screwed into the guideflanges 14 on opposite sides of the blocks or plates 38, and one of said bolts passes through the opening of the strap, while the other bolt passes through the notch in the other end of the strap. It is evident that the bolts may be turned to press the strap against the end of the plates or blocks to force the beveled faces thereof into engagement with the work; but to release and remove the blocks the screws are reversed and the strap is turned on one screw or bolt to withdraw its notched or slotted end from the other screw or bolt, thus adjusting the strap out of alinement with the plates or blocks and permitting their ready removal from the tool-holder body.

The operation may be described briefly as follows: The tool-holder having been supplied with the proper tool andits shank or stem fitted in one of the toolsockets of an ordinary turret, the work is passed through the body of the holder, and the bolts 42 are adjusted to make the blocks or plates 38 engage with one side of the work. The eccentric bushing is now adj usted to preliminarily move the cam and the pivotal carrier into position for the tool to lie close to the work, and

finally the handle or lever is manipulated to turn the cam-shaft in the bushing and also turn the cam for that part of its working face of greater radius to lie opposite the tool-carrier. This adjustment of the cam causes it to impinge against the edge of the carrier and move the latter and the tool for the said tool to engage the work. It is evident that the camshaft and cam may be adjusted to successively advance the tool, but by reversing the cam-shaft the cam is turned for its part of less radius to engage the tool-carrier, and thus permit the latter to drop away from the worlz of the cam will be instantly followed or re= sponded to by a movement of the pivotal inclined tool-carrier. It is therefore evident that the tool-carrier will drop away from the work by gravity and that it is held to its working position by the pressure of the cam thereon.

Changes may be made in the form and proportion of some of the parts while their es sential features are retained and the spirit of the invention embodied. Hence I do not desire to be limited to the precise form of all the parts as shown, reserving the right to vary therefrom.

Having thus described the invention, what I claim is- I. In a tool-holder for turret-machines, the combination with a movable tool-carrier, of a compound cam-adjusting device composed of two independent cams or eccentrics and capable of two successive and independent periods of operation to preliminarily position the tool-carrier and to successively advance the latter to the work, substantially as described.

2. In a tool-holder for turret-machines, the combination with a movable tool-carrier, of a shiftable eccentric-support, a cam mounted in the eccentric-support to be shiftable therewith and engaging with the tool-carrier, and means for individually adjusting the shiftable eccentric-support and the cam, substantially as described.

3. In a tool-holderfor turret-machines, the combination with a movable tool-carrier, of a shiftable eccentric-support, an adjustingcam mounted in the eccentric-support to be shiftable therewith, a friction-brake engaging'with the eccentric-support to restrain the latter from play with the cam, and means for adjusting the cam separately from the eocen trio-support, substantially as described.

4. In a tool-holder for turret-machines, the combination with a movable tool-carrier, of an eccentric bushing having a yieldable clamping device associated therewith, a camshaft mounted in said bushing and provided with an operating-handle, and a cam fast with position of the tool-carrier causes it to rest by gravity against the cam, and any adjustment the shaft and engaging with the tool-carrier, substantially as described.

In testimony that I claim the foregoing as my own I have hereto aifixed my signature in the presence of two witnesses.

GEORGE J. WINKLE.

Witnesses:

JAs. P. WINKLE, EDWARD HIGGINS. 

